Saturday morning, from 10 a.m. to 12 noon Eastern, join Politics Nation on XM Radio's POTUS '08, when we'll tackle the week in politics. Listen free here (link about half-way down the page) as:

-- In the next five months, David Plouffe and Rick Davis will become famous for managing Barack Obama's and John McCain's campaign. But what are they, and their various departments, actually doing? We talk to four top strategists who have run campaign strategy, polling, finance and press offices about what those in now in their shoes will face.

-- Hillary Clinton's supporters have complained of rampant sexism in coverage of her campaign compared with that of Obama's campaign. How much did sexism, or racism, play a role in the campaign? We talk to EMILY's List executive director Ellen Moran and Rem Rieder, editor and senior vice president of American Journalism Review.

-- And the passing of NBC Washington bureau chief Tim Russert has stunned the political world. We'll talk about Russert's life, his legacy and the lives he touched.

All that and a few surprises, we're sure, Saturday morning on Politics Nation, only on XM Radio's POTUS '08. Listen live, Saturday from 10 a.m. to noon Eastern and again at 6:00 p.m. Eastern.